3 interviews, 20 minutes each
Discussed standard aspects of maths and physics
Mock interview
They were helpful in clearing up any confusion
Remember this advice isn't official. There is no guarantee it will reflect your experience because university applications can change between years. Check the official Cambridge and Oxford websites for more accurate information on this year's application format and the required tests.
Also, someone else's experience may not reflect your own. Most interviews are more like conversations than tests and like, any conversation, they are quite interactive.
I had 3 interviews throughout one day. The first was around 9am last around 3 pm. Each lasted around 20 minutes and there were always two interviewers. They went directly onto the subject related questions.
There were number theory questions, calculus, logic, and in the physics interview, mechanics. It ended with an estimation where I was way off the mark. I felt like they went quite well.
Someone I knew prepared a
Beforehand I was a bit confused because it said there would be two interviews but in my timetable there were three. When I asked about this they were very clear and helpful.